Pretty sure the new Wildcat MKIII's and Mavericks already have the one on the left. The one on the right is the best option. I have 3 of three of the middle version for my Mavericks and I did have one slug probe bent on me. The one plus to the middle option is the hammer weight. Both of my Mavericks 22cal (Compact and Sniper) needed a heavier hammer weight to properly run the MRD's and KO's. I ordered those from FX and they sent them to me for free. Plus if yours has the old transfer port and doesn't have the new version with the slug port, that will give you some extra fps without having to turn the gun up. Also either slug probe will give you extra fps. I think your MKIII has 58 foot pound potential from what I hear on AGN. I love the look of the Wildcat MKIII.